<template>
  <div class='top-category'>
    <div class="container">
      <!-- 面包屑 -->
       <XtxBread separator="/">
        <XtxBreadItem to="/">首页</XtxBreadItem>
        <XtxBreadItem >{{categoryName}}</XtxBreadItem>
      </XtxBread>
      <!-- 轮播图 -->
      <XtxSlider :sliders="sliders"/>
      <!-- 所有二级分类 -->
      <div class="sub-list">
          <h3>全部分类</h3>
          <ul>
            <li v-for="i in categoryList.children" :key="i.id">
              <a href="javascript:;">
                <img :src="i.picture" >
                <p>{{i.name}}</p>
              </a>
            </li>
          </ul>
      </div>
      <!-- 分类关联商品 -->
      <div class="ref-goods" v-for="item in categoryList.children" :key="item.id">
          <div class="head">
            <h3>-  {{item.name}}  -</h3>
            <XtxMore to="/category/sub" />
          </div>
          <div class="body">
            <GoodesItem v-for="good in item.goods" :good="good" :key="good.id" />
          </div>
      </div>
    </div>
  </div>
</template>

<script>
import { findBanner } from '@/api/home'
import { findTopCategory } from '@/api/category'
import { ref, onMounted } from 'vue'
import { useRoute } from 'vue-router'
import GoodesItem from './components/goods-item.vue'
export default {
  name: 'TopCategory',
  components: {
    GoodesItem
  },
  setup () {
    // 轮播图
    const sliders = ref([])
    async function loadBanner () {
      const res = await findBanner()
      sliders.value = res.result
    }
    onMounted(
      () => {
        loadBanner()
      }
    )

    // 分类数据
    const categoryList = ref({})
    // 获取路由中的id
    const route = useRoute()
    // 分类名字
    const categoryName = ref('')
    // 函数的默认参数
    async function loadcategory (id = route.params.id) {
      const res = await findTopCategory(id)
      // console.log(res)
      categoryList.value = res.result
      categoryName.value = res.result.name
    }
    onMounted(() => {
      loadcategory()
    })
    // 解决点击分类页面不刷新bug 第二种方法
    // watch(
    //   () => { return route.params.id },
    //   () => { loadcategory() }
    // )

    // 解决点击分类页面不刷新bug 第三种方法 如果考虑优化得到情况下使用最好
    // onBeforeRouteUpdate(to => {
    //   // console.log(to)
    //   loadcategory(to.params.id)
    // })
    return {
      sliders,
      categoryList,
      categoryName
    }
  }

}
</script>

<style scoped lang="less">
.top-category {
  h3 {
    font-size: 28px;
    color: #666;
    font-weight: normal;
    text-align: center;
    line-height: 100px;
  }
  .sub-list {
    margin-top: 20px;
    background-color: #fff;
    ul {
      display: flex;
      padding: 0 32px;
      flex-wrap: wrap;
      li {
        width: 168px;
        height: 160px;
        a {
          text-align: center;
          display: block;
          font-size: 16px;
          img {
            width: 100px;
            height: 100px;
          }
          p {
            line-height: 40px;
          }
          &:hover {
            color: @xtxColor;
          }
        }
      }
    }
  }
  .ref-goods {
    background-color: #fff;
    margin-top: 20px;
    position: relative;
    .head {
      .xtx-more {
        position: absolute;
        top: 20px;
        right: 20px;
      }
      .tag {
        text-align: center;
        color: #999;
        font-size: 20px;
        position: relative;
        top: -20px;
      }
    }
    .body {
      display: flex;
      justify-content: space-around;
      padding: 0 40px 30px;
    }
  }
}
 .goods-item {
    display: block;
    width: 220px;
    padding: 20px 30px;
    text-align: center;
    img {
      width: 160px;
      height: 160px;
    }
    p {
      padding-top: 10px;
    }
    .name {
      font-size: 16px;
    }
    .desc {
      color: #999;
      height: 29px;
    }
    .price {
      color: @priceColor;
      font-size: 20px;
    }
  }
</style>
